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Antioxidant zrb2-sic-y2o3-sic coating on the surface of c-c composite material and preparation method thereof

A zrb2-sic-y2o3-sic, zrb2-sic-y2o3 technology, applied in the surface field, can solve the problems of easy peeling of the coating, reduced matrix bonding force, thermal expansion coefficient cracks, etc. The effect of the tendency to crack

Active Publication Date: 2022-07-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] CN110981546A discloses " C-C composite material surface oxidation resistance ZrB 2 -SiC-Y 2 o 3 Coating and its preparation method", the method will ZrB by atmospheric plasma spraying technology 2 -SiC-Y 2 o 3 Coated powder sprayed onto the surface of C-C substrate to prepare ZrB 2 -SiC-Y 2 o 3 The composite coating has a certain oxidation protection effect on the substrate, but in the process of cooling from high temperature oxidation, the coating will crack due to the mismatch of thermal expansion coefficient, and the bonding force with the substrate is reduced, and the coating is easy to peel off

Method used

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  • Antioxidant zrb2-sic-y2o3-sic coating on the surface of c-c composite material and preparation method thereof
  • Antioxidant zrb2-sic-y2o3-sic coating on the surface of c-c composite material and preparation method thereof
  • Antioxidant zrb2-sic-y2o3-sic coating on the surface of c-c composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] From the inside to the outside, it includes the C-C composite matrix, the SiC transition layer and the ZrB 2 -SiC-Y 2 O 3 Outer coating; the powder for the SiC transition layer is composed of Si, C, Al 2 O 3 Powder mixed, Al 2 O 3 The mass ratio of the powder to the Si and C mixed powder is 1:9, and the mass fraction of the Si powder in the Si and C mixed powder is 60-70%; the average particle size of the powder used in the transition layer does not exceed 50 μm, and the purity is not high. below 99.5%.

[0034] Antioxidant ZrB on the surface of the above C-C composites 2 -SiC-Y 2 O 3 -The preparation method of SiC coating is prepared by two-step embedding and infiltration technology, which specifically includes the following steps:

[0035] Step 1, matrix pretreatment

[0036] Grind and polish the C-C composite material matrix with a shape and size of 15mm × 15mm × 10mm, and chamfer the edge and corner areas. Use absolute ethanol for ultrasonic cleaning and d...

Embodiment 2

[0047] From the inside to the outside, it includes the C-C composite matrix, the SiC transition layer and the ZrB 2 -SiC-Y 2 O 3 Outer coating; the powder for the SiC transition layer is composed of Si, C, Al 2 O 3 Powder mixed, Al 2 O 3 The mass ratio of the powder to the Si and C mixed powder is 1:9, and the mass fraction of the Si powder in the Si and C mixed powder is 70-80%; the average particle size of the powder used in the transition layer does not exceed 50 μm, and the purity is not high. below 99.5%.

[0048] Antioxidant ZrB on the surface of the above C-C composites 2 -SiC-Y 2 O 3 -The preparation method of SiC coating, comprising the following steps:

[0049] Step 1, matrix pretreatment

[0050] Grind and polish the C-C composite material matrix with a shape and size of 15mm × 15mm × 10mm, and chamfer the edge and corner areas. Use absolute ethanol for ultrasonic cleaning and drying, and use corundum powder to sandblast the surface of the matrix for later...

Embodiment 3

[0060] From the inside to the outside, it includes the C-C composite matrix, the SiC transition layer and the ZrB 2 -SiC-Y 2 O 3 Outer coating; the powder for the SiC transition layer is composed of Si, C, Al 2 O 3 Powder mixed, Al 2 O 3 The mass ratio of the powder to the Si and C mixed powder is 1:9, and the mass fraction of the Si powder in the Si and C mixed powder is 80-90%; the average particle size of the powder used in the transition layer does not exceed 50 μm, and the purity is not high. below 99.5%.

[0061] Antioxidant ZrB on the surface of the above C-C composites 2 -SiC-Y 2 O 3 -The preparation method of SiC coating, comprising the following steps:

[0062] Step 1, matrix pretreatment

[0063] Grind and polish the C-C composite material matrix with a shape and size of 15mm × 15mm × 10mm, and chamfer the edge and corner areas. Use absolute ethanol for ultrasonic cleaning and drying, and use corundum powder to sandblast the surface of the matrix for later...

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Abstract

The invention discloses anti-oxidation ZrB on the surface of C-C composite material 2 ‑SiC‑Y 2 O 3 ‑SiC coating and method of making the same. First, a SiC transition layer was prepared on the surface of the C-C composite matrix by embedding and infiltration technology, and ZrB was prepared on the SiC transition layer by embedding and infiltration. 2 ‑SiC‑Y 2 O 3 outer coating. in ZrB 2 ‑SiC‑Y 2 O 3 The introduction of a SiC transition layer between the coating and the substrate can alleviate the mismatch of thermal expansion coefficients, release thermal stress, and further improve the oxidation resistance of the coating. The present invention adopts two-step embedding and infiltration technology to prepare ZrB 2 ‑SiC‑Y 2 O 3 ‑SiC composite coating has little thermal damage to the C‑C substrate, strong bonding force of the coating, and dense coating. The SiC transition layer effectively relieves the mismatch between the thermal expansion coefficients of the outer coating and the substrate, reduces the cracking of the outer coating due to thermal stress, improves the bonding force of the coating, and effectively improves the oxidation resistance of the coating.

Description

technical field [0001] The invention belongs to the technical field of surfaces, in particular to a surface anti-oxidation ZrB of a C-C composite material 2 -SiC-Y 2 O 3 -SiC coating and preparation method thereof. Background technique [0002] C-C composite material, namely carbon fiber reinforced carbon matrix composite material, is a high-performance structural material that is mainly studied in the high-tech field. C-C composite material is only composed of carbon elements, it not only retains the original excellent properties of matrix carbon, but carbon fiber overcomes the shortcomings of matrix carbon, with low density, high strength, high thermal conductivity, low thermal expansion coefficient, friction and wear resistance, good Its high temperature resistance and thermal shock resistance characteristics, especially its excellent high temperature mechanical properties, the strength does not decrease but increases with the increase of temperature (1000 ℃ ~ 2200 ℃),...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/89
CPCC04B41/89C04B41/52C04B41/009C04B41/5059C04B41/4545C04B41/455C04B41/5045C04B41/507C04B41/0072C04B35/83
Inventor 缪强马汉春梁文萍林浩刘阳阳薛林史伟伟许肖于海洋
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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